GLBINDFRAGDATALOCATI - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
Source : [FIXME: source]
Note : [FIXME: manual]

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NAMEglBindFragDataLocation − bind a user−defined varying out variable to a fragment shader color number

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C SPECIFICATIONvoid glBindFragDataLocation(GLuint program, GLuint colorNumber, const char * name);

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PARAMETERSprogram The name of the program containing varying out variable whose binding to modify colorNumber The color number to bind the user−defined varying out variable to name The name of the user−defined varying out variable whose binding to modify

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DESCRIPTIONglBindFragDataLocation explicitly specifies the binding of the user−defined varying out variable name to fragment shader color number colorNumber for program program​. If name was bound previously, its assigned binding is replaced with colorNumber​. name must be a null−terminated string​. colorNumber must be less than GL_MAX_DRAW_BUFFERS​. The bindings specified by glBindFragDataLocation have no effect until program is next linked​. Bindings may be specified at any time after program has been created​. Specifically, they may be specified before shader objects are attached to the program​. Therefore, any name may be specified in name, including a name that is never used as a varying out variable in any fragment shader object​. Names beginning with gl_ are reserved by the GL​. In addition to the errors generated by glBindFragDataLocation, the program program will fail to link if: •  The number of active outputs is greater than the value GL_MAX_DRAW_BUFFERS​. •  More than one varying out variable is bound to the same color number​.

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NOTESVarying out varyings may have indexed locations assigned explicitly in the shader text using a location layout qualifier​. If a shader statically assigns a location to a varying out variable in the shader text, that location is used and any location assigned with glBindFragDataLocation is ignored​.

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ERRORSGL_INVALID_VALUE is generated if colorNumber is greater than or equal to GL_MAX_DRAW_BUFFERS​. GL_INVALID_OPERATION is generated if name starts with the reserved gl_ prefix​. GL_INVALID_OPERATION is generated if program is not the name of a program object​.

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ASSOCIATED GETSglGetFragDataLocation() with a valid program object and the name of a user−defined varying out variable

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VERSION SUPPORT OpenGL Version Function / Feature Name 2​.0 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 2​.1 3​.0 3​.1 3​.2 3​.3 4​.0 4​.1 4​.2 4​.3 4​.4 4​.5 glBindFragDataLocation − − ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔

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SEE ALSOglCreateProgram(), glGetFragDataLocation()

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COPYRIGHTCopyright © 2010−2014 Khronos Group​. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1​.0, 8 June 1999​. http://opencontent​.org/openpub/​.

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